n-BUTYLAMINE
CH3(CH2)3NH2
MW: 73.16
METHOD: 2012, Issue 1
2012
CAS: 109-73-9
RTECS: EO2975000
EVALUATION: FULL
OSHA : 5 ppm (skin) ceiling NIOSH: 5 ppm (skin) ceiling ACGIH: 5 ppm (skin) ceiling (1 ppm = 2.99 mg/m 3 @ NTP)
Issue 1: 15 August 1994
PROPERTIES: liquid, ammoniacal odor; MP -49 °C; BP 77.8 °C; d = 0.7327 g/mL @ 25 °C; VP 10.9 kPa (82 mm Hg) @ 20 °C; vapor density 2.5 (air = 1)
SYNONYMS: butylamine, 1-aminobutane, NBA
SAMPLING SAMPLER:
MEASUREMENT
SOLID SORBENT TUBE (sulfuric acid-treated silica gel tube 150 mg/75 mg)
TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
n-butylamine
FLOW RATE:
0.01 to 1.0 L/min
EXTRACTION:
1 mL 50% methanol; neutralize a 500µL aliquot with 1 N KOH
VOL-MIN: -MAX:
2L 100 L
INJECTION VOLUME:
SHIPMENT:
routine
SAMPLE STABILITY:
TEMPERATURE-INJECTOR: -DETECTOR: -COLUMN:
at least 7 days @ 25 °C
BLANKS:
2 to 10 field blanks per set
ACCURACY RANGE STUDIED:
8.09 to 35.5 mg/m 3 [1] (15-L samples)
BIAS:
- 5.1%
5 µL 175 °C 195 °C 90 °C
CARRIER GAS:
N 2, 20 mL/min
COLUMN:
4% Carbowax 20M + 0.8% KOH on 60/80 mesh Carbopack B, 6 ft x 1/4"-O.D.
CALIBRATION:
standard solutions of butylamine in aqueous methanol
RANGE:
0.03 to 1 mg per sample [1]
ESTIMATED LOD: 0.012 mg per sample [2]
ˆ ): 0.092 [1] OVERALL PRECISION (S rT ACCURACY:
± 23.1%
PRECISION (Sr):
0.0490 [1]
APPLICABILITY: The working range is 0.7 to 144 ppm (2 to 430 mg/m 3) for a 15-L air sample. Using a nitrogen-specific detector instead of a FID will greatly increase sensitivity. This alternate detector has been used for amines with a 30-m x 0.25- mm x 0.25µm film DB-5 (5% methyl, phenyl-50% dimethyl-polysiloxane) fused-silica capillary column with a liner packed with KOH-co ated glass wool.
INTERFERENCES: Both concentrated sulfuric acid and silica gel are desiccants, so in sampling atmospheres above 60% relative humidity the sorbent tube may have lowered capacity.[1]
OTHER METHODS: This revises Method S138 [3]. Method 2010 for aliphatic amines may also be used for determination of nbutylamine.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
